我正在尝试使用 Windows 窗体在 Visual Studio 上制作一个均值和标准差计算器。这是一个类,我必须使用 windows 窗体,你必须能够手动输入数据或选择包含数据的 .txt 文件。
很难解释我需要做什么,因为我是新手。基本上我需要 button1_Click 的作用,但对 button2_Click 做同样的事情。问题是,它读取文件而不是从用户那里获取输入。它将值存储(不确定这是否是正确的词)到一个列表而不是我认为的数组。我不知道我是否可以将其转换为数组或将值作为数组添加到列表中或什么。我真的迷路了!
这是我的教授对这项任务的确切措辞:
“使用 C# 编写一个程序,该程序将找到多个数据点的平均值和标准差。该程序应允许用户手动输入数据或通过文本文件输入数据。”
任何帮助都会很棒我是新手,我的老师几乎没有提供任何帮助,让我们在互联网上搜索答案。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace BsweeneyCsharp3_1_
{
public partial class Form1 : Form
{
List<double> values;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
values = new List<double>();
}
void ShowValues()
{
listBox1.Items.Clear();
for (int i = 0; i < values.Count; i++)
listBox1.Items.Add(values[i]);
}
private void button1_Click(object sender, EventArgs e)
{
double value = 0.00;
double sum = 0.00, sumSquares = 0.00, squareSums;
double stdDev = 0.00, mean = 0.00;
if (textBox1.Text.Length == 0)
{
MessageBox.Show("You must enter a value.", "Standard Deviation");
return;
}
try
{
value = double.Parse(textBox1.Text);
values.Add(value);
ShowValues();
textBox1.Text = "";
textBox1.Focus();
}
catch (FormatException)
{
MessageBox.Show("The value you entered is invalid.",
"");
}
for (int i = 0; i < values.Count; i++)
{
sum += values[i];
}
mean = sum / values.Count;
squareSums = sum * sum;
for (int i = 0; i < values.Count; i++)
sumSquares += (values[i] * values[i]);
double numerator = values.Count * sumSquares - squareSums;
double denominator = values.Count * (values.Count - 1);
stdDev = Math.Sqrt(numerator / denominator);
textBox2.Text = mean.ToString();
textBox3.Text = stdDev.ToString("F");
}
private void button2_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "TXT|*.txt";
double mean = 0.00, stdDev = 0.00, sum = 0.00;
double sumSquares = 0.00, squareSums = 0.00;
int counter = 0;
if (ofd.ShowDialog() == DialogResult.OK)
{
textBox4.Text = ofd.FileName;
}
string line;
System.IO.StreamReader file = new System.IO.StreamReader(textBox4.Text);
List<string> list = new List<string>();
while ((line = file.ReadLine()) != null)
{
listBox2.Items.Add(line);
var dbl = Convert.ToDouble(line);
sum += dbl;
counter++;
}
if (counter > 0)
{
mean = sum / counter;
squareSums += sum * sum;
}
if(counter > 0)
{
sumSquares += Math.Pow((sum - mean), 2);
double numerator = counter * sumSquares - squareSums;
double denominator = counter * (counter - 1);
stdDev = Math.Sqrt(numerator / denominator);
textBox2.Text = mean.ToString();
textBox3.Text = numerator.ToString();
}
}
}
}